What disorders belong to obsessive-compulsive and related disorders?;OCD, body dysmorphic disorder, hoarding disorder, trichotillomania, excoriation disorder. What defines an obsession?;Recurrent, intrusive, unwanted thoughts, urges, or images that cause distress. What is the key response to obsessions?;Attempts to ignore, suppress, or neutralize them. What defines a compulsion?;Repetitive behaviors or mental acts performed in response to obsessions or rigid rules. What is the goal of compulsions?;To reduce anxiety or prevent feared events. Why are compulsions considered irrational?;They are not realistically connected to the feared outcome or are excessive. What is a diagnostic threshold for OCD?;Obsessions or compulsions are time-consuming (>1 hour/day) or cause distress/impairment. What is the difference between obsessions and compulsions?;Obsessions are intrusive thoughts, compulsions are behaviors to reduce distress. What types of obsessions are common?;Aggressive, sexual, religious. What types of compulsions are common?;Cleaning, checking, ordering, protective rituals. What is the key finding from Rachman & de Silva (1978)?;Intrusive thoughts in OCD are similar to those in non-clinical individuals. What distinguishes OCD intrusions from normal intrusions?;Higher frequency, intensity, duration, distress, and urge to neutralize. Why are intrusions not sufficient to explain OCD?;Intrusions are common in the general population. What explains the development of obsessions in cognitive theory?;Maladaptive interpretations of normal intrusions. What is emotional reasoning?;Assuming something is true because it feels true. What is magical thinking?;Believing thoughts or actions can cause unrelated events. What is dichotomous thinking in OCD?;Treating omission and commission as equally harmful. What is thought-action fusion (TAF)?;Belief that thinking about something is equivalent to doing it or makes it more likely. What is TAF-likelihood?;Belief that thinking increases probability of an event. What is TAF-moral?;Belief that thinking is morally equivalent to acting. What is the key mechanism in Salkovskis’ model of OCD?;Intrusions are misinterpreted, leading to anxiety and compulsions. What is the difference between ego-dystonic and ego-syntonic thoughts?;Ego-dystonic are unwanted, ego-syntonic are consistent with beliefs. Why is thought suppression ineffective?;It leads to increased frequency of the thought (rebound effect). What is the white bear effect?;Trying not to think about something makes it more likely to occur. What happens with repeated checking in OCD?;Memory distrust increases. What is the neurotic paradox in OCD?;Compulsions reduce anxiety short-term but maintain disorder long-term. Why do compulsions maintain OCD?;They prevent disconfirmation of feared outcomes. What is the role of avoidance in OCD?;Prevents learning that feared outcomes do not occur. What is Exposure with Response Prevention (ERP)?;Exposure to feared stimuli while preventing compulsive responses. Why is ERP effective?;It allows learning that feared consequences do not occur. What is the role of cognitive therapy in OCD?;To challenge maladaptive beliefs such as TAF. What medication is commonly used for OCD?;SSRIs. How does OCD medication differ from depression treatment?;Higher doses are typically required. When is deep brain stimulation used in OCD?;In severe, treatment-resistant cases. What is a key similarity between OCD patients and controls?;Both experience intrusive thoughts. What is a key difference between OCD patients and controls?;OCD patients attach more significance to intrusions. What maintains compulsive rituals over time?;Increasing frequency and habit formation. What is the core explanation for OCD development?;Normal intrusions + maladaptive interpretation + neutralizing behavior.